131121232 has 40 divisors (see below), whose sum is σ = 277884000. Its totient is φ = 59441280.

The previous prime is 131121181. The next prime is 131121241. The reversal of 131121232 is 232121131.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87078 + ... + 88570.

It is an arithmetic number, because the mean of its divisors is an integer number (6947100).

Almost surely, 2^131121232 is an apocalyptic number.

It is an amenable number.

131121232 is an abundant number, since it is smaller than the sum of its proper divisors (146762768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131121232 is a wasteful number, since it uses less digits than its factorization.

131121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011 (or 2005 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 131121232 is about 11450.8179620497. The cubic root of 131121232 is about 508.0319280571.

Adding to 131121232 its reverse (232121131), we get a palindrome (363242363).

The spelling of 131121232 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two hundred thirty-two".